Respuesta :

Answer:

GCF: 4 LCM:60

Step-by-step explanation:

Answer:

gcf-6, lcm-60

Step-by-step explanation:

factors of 20: 1, 2, 4, 5, 10, 20

factors of 12: 1, 2, 3, 4, 6, 12

multiples of 20: 20, 40, 60, 80, 100

multiples of 12: 12, 24, 36, 48, 60, 72